在Linux系统中

01 阻塞服务端

特征：1对1，阻塞。

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 server = socket.socket()        
 server.bind((,8000))    
 server.listen(5)                    
 
      conn,addr = server.accept()        
     (                           data = conn.recv(1024              data == b  data == b                 (                 
                              (                                     

02 非阻塞服务端

特征：1对多，轮询，非阻塞，占用资源多。

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 server = socket.socket()        
 server.setblocking(False)       
 server.bind((,8001))  
 server.listen(5)                
 
 
 all_connection = []             
      
              conn,addr = server.accept()    
         conn.setblocking(False)         
         (               
 
 
     
     handle = all_connection.copy()  
      connection                       recv_data = connection.recv(1024                                            :                               
                 (                  all_connection.remove(connection)       
                      

03 epoll服务端

特征：1对多，通知机制，非阻塞，占用资源少；epoll：注册惰性事件回调。

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  selectors 
  
 epoll = selectors.EpollSelector()   
 server = socket.socket()            
 server.bind((,8082 server.listen(100 
 
 
      
     conn,addres = server.accept()  
 
 
     
       
 
 
 
  
     data = conn.recv(1024                             epoll.unregister(conn)  
 
 
 
 
  
 
 
      events = epoll.select()  
 
      key,mask          sock = key.fileobj      
         callback = key.data     
 
         
         callback(sock)      

04客户端

测试服务端。

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 client = client.connect((,8082 
      data = input(      recv_data = client.recv(1024     (recv_data.decode())